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26 Cards in this Set
- Front
- Back
Definition of Clouds
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the visible products of condensation and deposition within the atmosphere.
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Cirrus or Cirro
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feathery
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Strato or Stratus
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layered
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Cummulo or Cummulus
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puffy
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Nimbo or Nimbus
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rain
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Fracto or Fractus
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broken (into pieces)
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High Clouds Definition
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above 20,000 feet
composed of ice (low temperature) prefix CIRRO caused by deposition |
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Types of High Clouds
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cirrus: wispy
cirrostratus: thin, the sun/moon shines through it, commonly called a halo cloud. cirrocummulus: puffy, looks like fish scales |
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Middle Clouds Definiton
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6500 to 20,000 feet
composed of ice crystals and super cold water prefix ALTO |
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Types of Middle Clouds
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altostratus: gray/off white, thick. no shadows.
altocummulus: patches that form lines/waves-large size, sharp features |
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Low Clouds Definiton
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base to 6500 feet
fog from surface to 6500 feet composed of water droplets NO prefix |
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Types of Low Clouds
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stratocummulus: large puffs arranged in layers
nimbostratus: dark gray clouds, showing precipitation stratus: may cause drizzle, gray, stretching from horizon to horizon |
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Advection Fog
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warm moist air over a water region-coastal.
occurs when land surface is cooler than water |
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Radiation Fog
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due to night time radiation cooling
found in low lying areas some occur over land, some occur over water |
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Frontal Fog
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due to uplifted air in either a cool or warm front
widespread, long lasting |
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Steam Fog
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evaporation fog
occurs over lakes and rivers water warmer than land |
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Clouds of Vertical Development
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cummulus: occurs as air rises 3000-6500 feet
resemble puffy cotton balls cummulonimbus: SEVERE weather clouds anvil shaped |
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Unusual Clouds
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altocummulus lenticularis: also known as lenticular clouds, found near mountain ranges
banner: draped over top of mountain (like a banner) contrail: from a plane |
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Types of Precipitation
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virga: rain that doesn't make it to the ground
mist: moisture from fog drizzle: small rain drops from stratus clouds rain: falls from nimbostratus or cummulonimbus freezing rain sleet snow hail:associated with severe weather |
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How it Rains: Collision Coalescence
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tiny cloud droplets catching more tiny rain droplets
forms one drop 1 million collisions=1 raindrop |
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How it Rains: Bergeron Process
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ice crystals falling
ice catches other flakes of ice, forming one large ice crystal melts before hitting ground |
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Weather Modification
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any change in weather by human activity
either intentional or otherwise |
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Weather Modification: Cloud Seeding
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trying to simulate bergeron process by injecting silver iodine into clouds to create rain
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Weather Modification: Fog Dispersal
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used to burn off fog in WW2 by RAF along runways
may also seed clouds, creating rain to wash the fog away. |
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Weather Modification: Hail Suppression
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church bells to break hail stones
trying to explode hail stones cloud seeding to prevent hail |
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Weather Modification: Frost/Freeze Control
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where crops are planted-warmer on hill slopes
smoke/mist clouds to shield/hold heat in fans in orchards hot caps to cover plants spraying water on crops so that they freeze while warm |